Main parts of the Solex 1B2 carburetor:
1 - carburetor body; 2 - return spring; 14 — throttle stop screw; 16 — auxiliary starting device actuator hatch; 18 — plug for adjusting screw of mixture quality (composition); 19 — mixture quality (composition) adjustment screw; 20 - sealing gasket; 21 — idle speed adjusting screw; 22 - sealing gasket; 24 — corrector of the qualitative composition of the mixture of the auxiliary starting device; 26 — auxiliary starting device actuator; 30 — throttle valve pneumatic drive; 32 - electromagnetic shut-off valve; 33 — air and fuel jets of the main idle system; 34 — air and fuel jets of the auxiliary idle system; 35 - main fuel jet; 36-41 — accelerator pump parts; 43 - accelerator pump nozzle; 54 - needle valve; 55 - float; 58 - accelerator pump drive parts; 62-67 — parts of the starting device housing; 68 — starting device cover.
Adjusting the starting clearance of the air damper
See the relevant paragraph in the subsection "Carburetor Solex "Zenith" 2B4").
Warning: The starting air gap of the IB2 carburetor is 4.5 mm.